ES2379182T3 - Closing provision for boats. - Google Patents

Abstract

Closing arrangement for cans and cans of the type comprising a tubular body (1) of sheet metal and having a side wall (10) having an upper edge (10a) defining a seat for the seat and retaining a lid (20) made of plastic material and intended to be removed manually, in which the upper edge (10a) of the side wall (10) comprises a peripheral annular flange (11) projecting radially outward from the tubular body (1), incorporating the latter internally and carrying, on a free outer edge, a continuous rib (12) protruding upward from the peripheral annular flange (11) and having a cross-sectional contour comprising two opposite circle arc portions (12a ) with centers of curvature arranged in the same plane (P) orthogonal to the axis of the tubular body (1), the cover (20) being provided in its lower part with a continuous circumferential groove (24) comprising a wall portion upper annular (24a), for the settlement of an inner wall portion (24b) and an outer wall portion (24c), by elastic deformation of at least one of the parts of the continuous rib (12) and the cover ( 20), against a circle arc portion (12a) of the continuous rib (12), above the plane (P), said arrangement further comprising an annular seal (30), the closure arrangement being characterized by the fact that said continuous circumferential groove also sits against a circle arc portion (12a) below the plane (P) so that it axially blocks the cover (20) in the tubular body (1), and by the fact that the annular gasket (30) is carried by one of the parts of the peripheral annular flange (11) and the cover (20) and pressed by the other of said parts when closing the cover (20).

Description

Closing provision for boats.

Field of the Invention

The present invention relates to a provision to provide the closure of boats of the type that it comprises a tubular body that has an upper edge that forms a seat on which a plastic cover sits and retains manually removable.

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Prior art

The prior art related to the present object provides different arrangements for boat closures, which have been developed to mainly guarantee the tightness of the container to be closed, as well as the possibility that the user can close the container again easily during progressive consumption of products stored inside said container. These provisions Hermetic seals are generally defined in the boats metallic that use a lid whose opening requires the help of any lever-shaped tool In another arrangement known, the closure of the lid is made on different boats made of plastic or glass and the retention of the lid is guaranteed by additional retention elements that are incorporated in the boat or lid structure.

In one of these solutions, the inconvenience it results not from constructive complexity, but from the fact that it is required a lever so that the user can open the container.

In the other solution, although the use of an additional tool to remove the lid, the layout constructive requires additional means, usually of complex construction and that substantially increase the price of final product, to fix the lid to the container.

In other well-known arrangements, the lid is settles and retains on the top edge of the container leaving with a slight elastic deformation, to ensure a secure retention of the lid on the container. However, these provisions, which they are widely used in plastic containers, they do not guarantee a adequate mutual tightness between the lid and the container, thus being used only to temporarily store different products, especially food items, in one phase relatively short storage, during the process of consume the contents of said containers.

In order to minimize inconvenience of the prior art, the same applicant proposed a provision of closure object of patent application WO 03076289 (PI 0200891-2) and that provides a boat that has a upper edge in the form of a continuous rib with its section transverse defined by at least a portion of circle arc, as well as a cover, usually of plastic material, provided with a continuous circumferential groove presenting an annular wall upper to be seated in the continuous rib, and a wall circumferential interior, against which the portion of Circle arc of the continuous rib.

Although a good tightness is guaranteed and a safe axial retention of the cover, the aforementioned closure arrangement Above it still presents aspects that must be improved.

In this previous solution, the axial retention of The lid is guaranteed only by interference between the wall inside the circumferential groove of the lid and a respective radially internal circle arc portion of the rib keep going. However, this setting is especially suitable for ensure the tightness and axial retention of the lid only in the applications where the lid is subjected to forces, such as the internal pressure in the container, which tend to displace said cover axially out of its seat in the boat. In the cases in which the boat is internally subjected to negative pressure until the first opening of the lid occurs, the solution Previous commented above does not ensure a tight seal during Long storage periods.

It should also be noted that it is even more desirable, in many cases, increase the degree of tightness in the closure, providing an annular seal, made by the continuous ribbing of the upper edge of the boat or through the groove circumferential of the lid and which is usually made of material plastic, like plastisol. Although these joints increase the degree of tightness in the closure, these act directly between the lid and the seat (rib) on which the seat sits and axially retains the upper edge of the boat, requiring special care and a complex application to avoid interference with the layout axial retention of the lid and generally producing a level unwanted wastage as a result of retention deficiencies and seal tightness.

Document FR2456668 discloses the features of the preamble of claim 1. The document
US1969524 discloses a container with a continuous rib that presses an annular seal between a lid and an annular flange.

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Summary Explanation of the Invention

The object of the present invention is provide a closure arrangement for metal boats that are internally subjected to positive or negative pressure, which allow to obtain simultaneously, through a construction simple at a relatively low cost, a high degree of tightness in the closure of the boat, an easy opening and a new lid closure by simple operations that do not require additional means or tools, as well as axial retention Secure the lid in the closed condition.

Another object of the invention is to provide a closing provision as cited above, containing a tamper-proof medium to evidence the first opening of the lid.

As already mentioned above, this closure provision applies to boats of the type comprising a tubular body, presenting an upper edge that defines a seat for the seat and retention of a plastic cover and which is manually removable from its closed position in the body tubular.

According to the invention, the upper edge of the body Tubular is constructed in such a way that it comprises an annular flange peripheral protruding radially outward from the body tubular, joining the latter internally and carrying, in a free outer edge, a continuous rib that protrudes towards above the peripheral annular flange and presenting an outline of cross section comprising two circle arc portions opposite with their centers of curvature arranged in the same plane orthogonal to the axis of the tubular body.

The lid, in turn, is provided in its part bottom of a continuous circumferential groove comprising a portion of the upper annular wall that is intended to settle in continuous ribbing, and portions of inner and outer wall intended to settle, by elastic deformation of at least one of the parts of the continuous rib and the cover, against the respective circle arc portions of the continuous rib, above and below said plane, so that it axially blocks the tubular body cap.

This closing arrangement comprises also a seal made by one of the parts of the annular peripheral flange and the lid and which is pressed by the other of these parts when closing the lid.

In a preferred construction, the lid carries in addition, peripherally at the bottom through a plurality of brittle bridges, a sealing strip that the user manually breaks with the first opening of the lid, said sealing strip generally placed in a higher region of the tubular body having a cross-sectional contour which is reduced in relation to the rest of the body, to maintain said sealing strip within the largest contour of the body tubular and thereby protected from unwanted impacts during boat handling and shipping operations.

The construction of the circumferential groove continues under the lid, which cooperates both externally and internally with the respective circle arc portions of the rib continuous from the upper edge of the tubular body, allows the lid remains reliably axially locked in said rib continuous, under the conditions under which said lid is subjected to internal pressures or axial forces that pull it out of the body, as well as in the conditions in which said lid is subjected to axial forces that push it inside the canister, what happens when the product is stored under negative pressure conditions, to keep it that way throughout the long storage period, before the first opening of the same.

The provision of the annular gasket between the lid and the peripheral annular flange of the tubular body allows said board is constructed in order to guarantee exclusively a high degree of tightness, without the construction project of the board intervene in the construction project of the rib continuous and continuous circumferential groove of the lid, for achieve adequate axial blocking of the latter.

Hence, the constructive solution proposed in the This report aims to ensure a high degree of reliability with respect to the mechanical retention of the lid to the boat, as well as a high degree of tightness obtained not only before the first opening of the lid, but also later, during the successive closing of the same, during the progressive consumption of stored product.

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Brief description of the drawings

The invention will be described below, with reference. to the attached drawings given as an example of possible embodiments of the invention and in which:

Figure 1 represents an elevation view partially sectioned side of a boat closed by a lid and which incorporates the closing provision object of this invention;

Figure 2 represents a plan view of the assembly illustrated in figure 1;

Figure 3 represents a sectional view partial diametral vertical of the lid, the joint and the portion upper tubular body, in a fragmented condition, said section taken according to line III-III of the figure 2;

Figure 3A represents a view similar to the view shown in figure 3, but with the lid in a condition assembled, mounted on the tubular body;

Figures 4 and 4A represent similar views to those shown in figures 3 and 3A, respectively but illustrating another possible construction to assemble the ring seal in the boat lid.

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Detailed description of the invention

As already mentioned and illustrated in the drawings, this closing provision applies to boats type comprising a tubular body 1, whose side wall 10, formed of a metallic sheet, it has an upper edge 10a that defines a seat for the seat and the retention of a lid 20 constructed of plastic material and that is manually removable and relocatable in the boat, closing it several times since its first opening, to allow the progressive consumption of the product stored.

According to the invention, the upper edge 10a of the tubular body 1 comprises a peripheral annular flange 11 which protrudes radially out of the tubular body 1 and that incorporates the latter, so that it carries, on an outer edge free, a continuous rib 12 that normally protrudes towards above the peripheral annular flange 11 and having an outline cross section comprising two arc portions of opposite circle 12a with its centers of curvature arranged in a P plane orthogonal to the axis of the tubular body 1.

In the preferred illustrated construction, the peripheral annular flange 11 and continuous rib 12 are formed in one piece with the side wall 10 of the tubular body 1, being enough that the metal sheet, which forms said side wall 10, be properly deformed to allow flange provision annular peripheral 11 and continuous rib 12. In this case, the continuous rib 12 has a tubular shape obtained by bending the metal sheet of the side wall 10 of the tubular body 1, said continuous rib 12 preferably presenting an outline circular that matches that of the two circle arc portions 12th

As illustrated, the continuous rib 12 it has a tangent of placement to the peripheral annular flange 11, thus placing itself immediately above the plane of the latter, allowing a certain axial distance between the plane to be defined of the peripheral annular flange 11 and an upper tangential plane to the entire circumferential extent of the continuous rib 12. Also according to the invention, the cover 20 is provided in its part bottom of a continuous circumferential groove 24 comprising a upper annular wall portion 24a configured to settle on the continuous rib 12 of the tubular body 1, and wall portions interior and exterior 24b and 24c to settle, by deformation elastic of the continuous rib 12 and / or of the lid 20, against the respective portions of circle arc 12a of the rib 12, both above and below the plane P, such that axially block the cover 20 in the tubular body 10.

The present closing arrangement further comprises an annular sealing gasket 30 made by the annular peripheral flange 11 or by the cover 20, the annular gasket 30 being pressed by the other of said parts when closing the
top.

In the illustrated construction, the cover 20 comprises, in one piece and molded in a suitable plastic material, a central wall 21 sized to cover practically the upper open region of the tubular body 1, a peripheral wall 22, incorporated in the lower part of the central wall 21 and incorporating in its upper part an annular wall 23 projecting radially outward and under which the continuous circumferential groove is provided
24.

In the construction illustrated in Figures 3 and 3A, the annular seal 30 is carried by the peripheral annular flange 11, said annular gasket 30 sticking or otherwise joining the annular peripheral flange 11. It should be understood that the annular flange peripheral 11 may have a circumferential channel 11a, at low relief and that is sized to receive and accommodate a portion of base of the annular seal 30, facilitating the provision of said seal on the peripheral annular flange 11, especially in cases where which the joint is obtained from a molded material, such as Plastisol

As illustrated in more detail in Figures 3 and 3A, the annular wall 23 of the lid 20 may incorporate in its part bottom, in one piece, at least one continuous rib 25, dimensioned and configured to be pressed against the joint cancel 30 when closing lid 20, further increasing the degree of tightness in the mutual seat of the cover 20 / ring seal 30.

In another possible embodiment of the invention illustrated in figures 4 and 4A, the ring seal 30 is attached under the annular wall 23 of the cover 20. In this construction exemplary, the peripheral annular flange 11 of the tubular body 1 can incorporate, at the top, at least one rib continued 15 which must be pressed against the ring seal 30, at close the lid 20, as illustrated in Figures 4 and 4A.

It should be understood that the annular wall 23 of the lid 20 can present internally, as illustrated in the figures 4 and 4A, a circumferential channel 23a, in low relief and which is sized to receive and accommodate a base portion of the joint 30

Also according to the construction illustrated in the Figures 4 and 4A, the continuous rib 15 of the annular flange peripheral 11 can be obtained by deformation of the latter, during the shaping operations of the tubular body 1 for provide peripheral annular flange 11 and continuous rib 12.

As already mentioned, it is desirable to provide the present closing provision of an element capable of evidencing the first opening of the lid, to ensure safety and inviolability of the stored product. Thus, the annular wall 23 of the lid 20 may carry peripherally at its bottom and to through a plurality of brittle bridges 26, a strip of sealed 27, usually in the form of a cylindrical skirt that hangs of the cover 20. To prevent the sealing strip 27 from being subjected to unwanted impacts with other objects or sealing strips similar during shipping and handling of the boat closed, the tubular body 1 preferably has a portion upper 1a that has a cross-sectional contour that is reduced in relation to the contour of a remaining portion 1b of said tubular body 1, so that the axial projection of the contour outside of the cover 20 is within the contour of said portion 1b remaining of the tubular body 1. In order to hinder the access to the region of the continuous rib 12 of a tool in shape of an elongated lever, and with it the violation of the content of the boat lifting the lid without breaking the brittle bridges 26 of the sealing strip 27, the height of the upper portion 1a of the tubular body 1 is only slightly greater than the axial distance between the lower edge of the sealing strip 27 and the edge upper 10a of the side wall 10 of the tubular body 1.

With the constructive arrangement of the body tubular 1 described above, the lower edge of the strip of sealed 27 is placed so that it is adjacent to the wall lateral 10 of the tubular body 1, making it impracticable that a tool, a lever or some metal bar is introduced in the annular space between the sealing strip and the body tubular 1, to reach the settlement and retention region of the lid, to deform said region enough to unlock axially the cover, without damaging the sealing strip and its bridges brittle 26.

Although here only two ways have been illustrated constructive for this closing provision, must it is understood that modifications in the form and the component layout, without departing from the concept constructive defined in the claims that accompany the present memory

Claims (12)

1. Closing arrangement for cans and cans of the type comprising a tubular body (1) of sheet metal and having a side wall (10) having an upper edge (10a) defining a seat for the seat and the retention of a cover (20) made of plastic material and intended to be removed manually, in which the upper edge (10a) of the side wall (10) comprises a peripheral annular flange (11) projecting radially outward from the tubular body (1 ), incorporating internally to the latter and carrying, on a free outer edge, a continuous rib (12) protruding upward from the peripheral annular flange (11) and having a cross-sectional contour comprising two opposite arc circle portions (12a) with centers of curvature arranged in the same plane (P) orthogonal to the axis of the tubular body (1), the cover (20) being provided in its lower part with a continuous circumferential groove (24) comprising a portion of pa upper ring network (24a). for the settlement of an inner wall portion (24b) and an outer wall portion (24c), by elastic deformation of at least one of the parts of the continuous rib (12) and the cover (20), against a portion of arc of circle (12a) of the continuous rib (12), above the plane (P), said arrangement further comprising an annular seal (30), the closure arrangement being characterized by the fact that said continuous circumferential groove is also sits against a circle arc portion (12a) below the plane (P) so that it axially locks the cap (20) in the tubular body (1), and by the fact that the annular gasket (30) is carried by one of the parts of the peripheral annular flange (11) and the cover (20) and pressed by the other of said parts when closing the cover (20). 2. An arrangement according to claim 1, characterized in that the continuous rib (12) has a cross section with a circular contour coinciding with that of the two circle arc portions (12a) and tangent to the peripheral annular flange ( eleven). 3. An arrangement according to any one of claims 1 or 2, characterized in that the peripheral annular flange (11) and the continuous rib (12) are formed in one piece with the side wall (10) of the tubular body ( one). 4. Arrangement according to claim 1, characterized in that the annular peripheral (11) of the side wall (10) of the tubular body (1) is provided with a circumferential channel (11) in low relief and is sized to receive and accommodate a base portion of the gasket (30). 5. The arrangement according to claim 1, characterized in that the cover (20) comprises, integrally, a central wall (21), a peripheral wall (22) built from the bottom to the middle wall (21) and incorporated at the top to an annular wall (23) under which the continuous circumferential groove (24) is provided. 6. An arrangement according to claim 5, characterized in that the annular wall (23) of the cover (20) is provided with a circumferential channel (23a) in low relief and which is dimensioned to receive and accommodate a portion of joint base (30). 7. An arrangement according to claim 5, characterized in that the annular gasket (30) is carried by the peripheral annular flange (11), the annular wall (23) of the cover (20) incorporating in its lower part the minus a continuous rib (25) intended to be pressed against the ring gasket (30) when closing the cover (20). 8. An arrangement according to claim 5, characterized in that the annular wall (23) of the cover (20) carries, peripherally in its lower part and through a plurality of brittle bridges (26) a sealing strip ( 27) in the form of a cylindrical skirt that hangs from the lid (20). 9. An arrangement according to claim 8, characterized in that the tubular body (10) has an upper portion (1a) with a cross-sectional contour that is reduced in relation to the contour of a remaining portion (1b) of said tubular body (1), such that the axial projection of the outer contour of the cover (20) is within the contour of said remaining portion (1b) of the tubular body (1). 10. An arrangement according to claim 9, characterized in that the height of the upper portion (1a) of the tubular body (1) is slightly greater than the axial distance between the lower edge of the sealing strip (27) and the upper edge (10a) of the tubular body (1). 11. An arrangement according to claim 5, characterized in that the annular gasket (30) joins under the annular wall (23) of the cover (20), with the peripheral annular flange (11) of the tubular body (1) ) incorporating at the top at least one continuous rib (15) intended to be pressed against the annular gasket (30) when closing the cover (20). 12. Arrangement according to claim 11. characterized in that the continuous rib (15) of the peripheral annular flange (11) is obtained by deformation of the latter.